In the year 1300, at age 35, the narrator of Dante’s Inferno famously finds himself in trouble: Midway in our life’s journey, I went astray from the straight road and woke to find myself alone in a dark wood. How shall I say what wood that was! I never saw so drear, so rank, so arduous a wilderness! Its very memory gives a shape to fear. The grand jury witness finds himself or herself in a position not unlike that of the Italian poet at the beginning of his trek through the Divine Comedy. The federal grand jury is one of the most…